linux-kernel - [tip: timers/urgent] jiffies: Cast to unsigned long in secs_to

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Message-ID: <173831299312.31546.8797889985487965830.tip-bot2@tip-bot2>
Date: Fri, 31 Jan 2025 08:43:12 -0000
From: "tip-bot2 for Easwar Hariharan" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: kernel test robot <lkp@...el.com>,
 Easwar Hariharan <eahariha@...ux.microsoft.com>,
 Thomas Gleixner <tglx@...utronix.de>, stable@...r.kernel.org, x86@...nel.org,
 linux-kernel@...r.kernel.org
Subject: [tip: timers/urgent] jiffies: Cast to unsigned long in
 secs_to_jiffies() conversion

The following commit has been merged into the timers/urgent branch of tip:

Commit-ID:     bb2784d9ab49587ba4fbff37a319fff2924db289
Gitweb:        https://git.kernel.org/tip/bb2784d9ab49587ba4fbff37a319fff2924db289
Author:        Easwar Hariharan <eahariha@...ux.microsoft.com>
AuthorDate:    Thu, 30 Jan 2025 19:26:58 
Committer:     Thomas Gleixner <tglx@...utronix.de>
CommitterDate: Fri, 31 Jan 2025 09:30:49 +01:00

jiffies: Cast to unsigned long in secs_to_jiffies() conversion

While converting users of msecs_to_jiffies(), lkp reported that some range
checks would always be true because of the mismatch between the implied int
value of secs_to_jiffies() vs the unsigned long return value of the
msecs_to_jiffies() calls it was replacing.

Fix this by casting the secs_to_jiffies() input value to unsigned long.

Fixes: b35108a51cf7ba ("jiffies: Define secs_to_jiffies()")
Reported-by: kernel test robot <lkp@...el.com>
Signed-off-by: Easwar Hariharan <eahariha@...ux.microsoft.com>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Cc: stable@...r.kernel.org
Link: https://lore.kernel.org/all/20250130192701.99626-1-eahariha@linux.microsoft.com
Closes: https://lore.kernel.org/oe-kbuild-all/202501301334.NB6NszQR-lkp@intel.com/
---
 include/linux/jiffies.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/jiffies.h b/include/linux/jiffies.h
index ed945f4..0ea8c98 100644
--- a/include/linux/jiffies.h
+++ b/include/linux/jiffies.h
@@ -537,7 +537,7 @@ static __always_inline unsigned long msecs_to_jiffies(const unsigned int m)
  *
  * Return: jiffies value
  */
-#define secs_to_jiffies(_secs) ((_secs) * HZ)
+#define secs_to_jiffies(_secs) (unsigned long)((_secs) * HZ)
 
 extern unsigned long __usecs_to_jiffies(const unsigned int u);
 #if !(USEC_PER_SEC % HZ)